Connecting assembly for fastening an add-on element on a carrier element

Abstract

A connecting assembly ( 10 ) for fastening an add-on element ( 56 ) on a carrier element ( 58 ) includes a first connecting part ( 12 ) which can be inserted into an opening ( 64 ) of the carrier element ( 58 ). The first connecting part ( 12 ) has retaining means for fixing the first connecting part ( 12 ) to the carrier element ( 58 ). The connecting assembly ( 10 ) further includes a second connecting part ( 14 ) which can be inserted into a bore ( 60 ) of the add-on element ( 56 ). The second connecting part ( 14 ) is adapted to be inserted into the first connecting part ( 12 ). The connecting assembly ( 10 ) is adapted to be converted from a pre-mounted state, in which the retaining means permit a removal of the first connecting part ( 12 ) from the carrier element ( 58 ), into a mounted state, in which the retaining means do not permit a removal of the first connecting part ( 12 ) from the carrier element ( 58 ). The connecting assembly ( 10 ) can be converted from the pre-mounted state into the mounted state by pressing down the second connecting part ( 14 ) into the first connecting part ( 12 ), and from the mounted state back into the pre-mounted state by a rotation of the second connecting part ( 14 ) relative to the first connecting part ( 12 ).

1 . A connecting assembly for fastening an add-on element on a carrier element, the connecting assembly comprising
 a first connecting part which can be inserted into an opening of the carrier element and has retaining means for fixing the first connecting part to the carrier element, and   a second connecting part which can be inserted into a bore of the add-on element,   the second connecting part being adapted to be inserted into the first connecting part,   the connecting assembly being adapted to be converted from a pre-mounted state, in which the retaining means permit a removal of the first connecting part from the carrier element, into a mounted state, in which the retaining means do not permit a removal of the first connecting part from the carrier element,   the connecting assembly being adapted to be converted from the pre-mounted state into the mounted state by pressing down the second connecting part into the first connecting part, and from the mounted state back into the pre-mounted state by a rotation of the second connecting part relative to the first connecting part.   
   
   
       2 . The connecting assembly according to  claim 1 , wherein the first connecting part is a metallic part. 
   
   
       3 . The connecting assembly according to  claim 1 , wherein the second connecting part is a plastic part. 
   
   
       4 . The connecting assembly according to  claim 1 , wherein the second connecting part has a reception for a screw tool by which the second connecting part can be rotated relative to the first connecting part. 
   
   
       5 . The connecting assembly according to  claim 1 , wherein in the pre-mounted state, one of the connecting parts takes an axial position relative to the other connecting part, which is different from that in the mounted state. 
   
   
       6 . The connecting assembly according to  claim 5 , further comprising a ramp structure which ensures, during a rotation of the second connecting part relative to the first connecting part, that the axial position of the second connecting part relative to the first connecting part changes. 
   
   
       7 . The connecting assembly according to  claim 6 , wherein the ramp structure is designed such that the connecting assembly can be converted from the mounted state into the pre-mounted state by a rotation of the second connecting part through a predetermined angle. 
   
   
       8 . The connecting assembly according to  claim 7 , wherein the angle amounts to 120°. 
   
   
       9 . The connecting assembly according to  claim 1 , wherein one connecting part has a tapered end which can be inserted into a bore of the other connecting part. 
   
   
       10 . The connecting assembly according to  claim 1 , wherein in the pre-mounted state, the two connecting parts are captively held together. 
   
   
       11 . The connecting assembly according to  claim 1 , wherein in the pre-mounted state, latching portions of one of the connecting parts cooperate with latching recesses of the other connecting part. 
   
   
       12 . The connecting assembly according to  claim 11 , wherein in the pre-mounted state, the latching portions and the latching recesses dictate a determined angular position of the two connecting parts relative to each other, which permits a further insertion of the second connecting part into the first connecting part. 
   
   
       13 . The connecting assembly according to  claim 1 , wherein in the pre-mounted state, locating faces of one of the connecting parts cooperate with the rim of a bore of the other connecting part. 
   
   
       14 . The connecting assembly according to  claim 13 , wherein in the pre-mounted state, the locating faces and the rim of the bore dictate a determined angular position of the two connecting parts relative to each other, which permits a further insertion of the second connecting part into the first connecting part. 
   
   
       15 . The connecting assembly according to  claim 1 , wherein in the mounted state, latching portions of one of the connecting parts cooperate with latching faces of the other connecting part. 
   
   
       16 . The connecting assembly according to  claim 1 , wherein the retaining means include at least one expanding element having a retaining portion which can be pivoted radially inwards in the pre-mounted state, but not in the mounted state, to permit the passage of the first connecting part through an opening of the carrier element. 
   
   
       17 . The connecting assembly according to  claim 16 , wherein the expanding element has a clamping portion which rests against a portion of the second connecting part under prestress in the mounted state, but not in the pre-mounted state.